On Tue, 2014-08-26 at 13:45 +0300, Heikki Linnakangas wrote: > Yeah. This patch in the current state is likely much much slower than > unpatched master, except in extreme cases where you have thousands of > connections and short transactions so that without the patch, you spend > most of the time acquiring snapshots.
What else are you looking to accomplish with this patch during this 'fest? Bug finding? Design review? Performance testing? I haven't had a good track record with my performance testing recently, so I'm unlikely to be much help there. It seems a bit early for bug hunting, unless you think it will raise possible design issues. I think there's already at least one design issue to consider, which is whether we care about CLOG/CSNLOG access for hinted records where the xid > snapshot->xmin (that is, accesses that previously would have looked at xip). Would more discussion help here or do we need to wait for performance numbers? Regards, Jeff Davis -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers